Metal bench block



FIG. 1 is a front, top and right side perspective view of a metal bench block, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed broken lines depict portions of the metal bench block that form no part of the claim design. 

CLAIM The ornamental design for a metal bench block, as shown and described. 